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Here's How to Fix It Quickly and Get Your iPhone Running Smoothly!
Check Face ID Settings: Go to Settings > Face ID & Passcode and see that Face ID is enabled for the intended features (e.g., unlocking, apps, Apple Pay). If it's off, toggle it back on and test.
Reconfigure Face ID: Reset Face ID by going to Settings > Face ID & Passcode > Reset Face ID. Set it up again by following the on-screen instructions to scan your face.
Clean the TrueDepth Camera: Wipe the front camera area with a clean, dry cloth to remove dirt or smudges. Check that nothing is blocking the camera, such as a screen protector or case.
Check Lighting Conditions: Face ID works best in good lighting. Avoid extremely dark or bright environments. Adjust your position for a better scan if necessary.
Update or Reinstall iOS: Ensure your iPhone is running the latest iOS 18 update by checking Settings > General > Software Update.
Restart or Force Restart Your iPhone: Restart your device to clear temporary glitches. For a force restart, use the button combination specific to your iPhone model.
Contact Apple Support: If none of these fixes work, the issue may be hardware-related. Visit an Apple Store or authorized service provider for professional assistance.